One vertex per element, one color per generator, with an edge from x to x·s.
(2,4)(5,6)(7,10)(8,9)(11,12)(13,14)(15,20)(16,18)(17,19)(21,22,26,27)(23,28,32,35)(24,25,34,29)(30,36,33,31)(5,6,8,9)(7,11,12,10)(14,16)(17,20)(22,27)(25,29)(28,35)(31,36)(6,9)(10,11)(13,15,18,19)(14,17,16,20)(21,23)(22,28)(24,33)(25,31)(26,32)(27,35)(29,36)(30,34)(1,2,3,4)(5,6)(7,11)(8,9)(10,12)(13,16,18,14)(15,17,19,20)(21,24,26,34)(22,29,27,25)(23,30,32,33)(28,31,35,36)(5,7)(6,10)(8,12)(9,11)(13,17)(14,19)(15,16)(18,20)(21,25,26,29)(22,24,27,34)(23,31,32,36)(28,33,35,30)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.